Dumping vehicle



May 6, 1930. c.. F. H|GG1NS DUMPING VEHCLE Filed ont. 9, 1925 Patented May 6,1930- .PATENT oFF-lcs CLARK F. HIGGINS, 0F luminosa, MAssaci-rusnrirs C t.

` DUMPING VEHIcLEQ f V` Application led October 9, 1923. L'Serial iN'o.` 667,445.

The present invention relates `to'dumping vehicles and more particularly to elevating or hoisting devices for dumping vehicles. i

The object of the invention is to provideA 5 a dumping vehicle of simple and rugged construction, the body ofwhich can'be elevated in an efiicientmanner from the beginningto the end of the hoist without placing undue stresses on any parts of the mechanism.

With this object in view the invention consists of certain novel features of construction, combinations vand arrangements of parts' hereinafter described and particularly i de-` fined in thev claims.

In the accompanying drawings illustrating the preferred form of the invention Fig. 1 is a side elevation of the body and frame of the improved dumpingvehicle; Fig. 2 isV a detail plan view of one of the hoisting arms and adjacent parts; and Fig. 3 is a'section on line 3 3 of Fig. 1.

The illustrated embodiment of the invention comprises a body 5 havin@V a floor 6 supported upon the I-beams 8, thelbody beingpivoted at 10 to the frame 12 of the vehicle at its rear end. The elevating is effectedV through a pair of hoisting arms, one of which is indicated generally at 14, the other being disposed in a similar position at the other side 3? of the vehicle. As viewed in side elevation the hoisting arm 14 is provided with a long horizontal portion and an upwardly inclined portion at the rear, the rear end being pivoted upon a cross rod 16 which passes through the floor beam 8 and extends transversely under the body to the other side. The forward end of the hoisting arm 14 takes against a stop 20 depending from the floor 6 of the body.

Y As viewed in Fig. 2, the hoisting arm 14 pre1 sents in plan a yoke-shaped appearance, consisting of a single piece of metal bent to form side plates 22 and 23.connected by the U- shaped forward end 24, the plates being separated by a spacer sleeve 25on the rod 16,.

" The hoisting arm is attached to a cable 26 by means of an eye bolt 28 securedv inthe forward end of the arm, the cable being fastened atits other end to a driving shaft 30 .which is journaled in brackets 32 attached to the yframe 12. The driving shaft is rotated in any inasmuch astheiniaai puuon the hoisting' usual or preferred manner, as by hand or from the vehicleengine, to wind up the cable an'd'exert an endwisepullgupon the hoisting arms to lifev thebody to the position indicated at Ain' dot and dash lines. Y 55 arms is not in suchadirectionas to lift the body directly upward, itis desirable to provide additional means for giving thebody a direct-upward thrustuntil the partjs'liave assumed such a' position that the pull upon the arms through the cable' is made effective for continuing the motion of the body. To this endthe driving shaft 30.is provided atfeach end with a pair of cams 34 bearing against an anti-friction roller 36 mounted between the side plates of the hoisting arm, such that upon the first rotationA of the driving shaft the cam pushes upwardly on the hoistingarms,the cable being meanwhile wound'up on the driving shaft to move the body into'the position shown ati B. in dash lines. Affter the cams have lifted the bodyas far as .they are able,

i the :hoisting farm. and the body Vare Aarranged ata suficient angle ,with` respect to each other so that. continued winding ofthe cable imparts a thrustuponthe body in the desired direction ofqmjotion, thus lifting the body ultimatelyto position A,.thefcams meanwhile rotating between the side plates of the hoisting arm by *virture' of` their narrower spacing, as shown Fig. 3. The cable is preferably: .woundy on the underside, of the the driving'shaft, as indicated in Fig. 1, so as to eXertra sucient initial downward component offorceupon the forward end of the hoisting'arm to cause the'arm to act as a lever with its fulcrum on' the cams 34 to give an upwardy thrust to the body, :augmenting the "upward'thrust attained bythe cams themselves.- f

It will be seen thatthe present invention provides a construction by whichan'initial `upward thrust may be readily given to the body so jas to place the parts in such position that the continuation of the lift may be most readily accomplished. Furthermore, the hoisting armsmayv be; constructedso as to resist only longitudinal stresses. The -camson the driving shaftfserve to confine the ,10o

cable kvWinding so that the `pull on the hoisting arms is always substantially longitudinal, there being no appreciable lateral stress by Virte of the restricted'spac'e in Which the cable is Wound on the shaft. The cable may also Wind in several layers on the shaft, there- Y Y byv increasing the eiectve diameter of the Y Y Winding drum the hoisting proceeds so that the iinal operation ofthe hoist, whenthe i hoisting arms are ,iny theirV inost effective posif tion, may be carried oiit'atgsoriietyhat greater speed than the initial portion ofthe hoist.

' The nature and scope of the inventinhaving been indicated anclvajinleehanism embodying the invention' having vbeen specioally ldescribed, what is olaimediisz-'" l". A dumping vehicle having, iny combina`- tion,' 'dunipinglbody `a I pairf roff` normally hoiz'ontal-hoistin'g arms for the body, aas'haft, connections from the shaftto'thejhoistingr arnis for lifting the bodyvupon rotation-'of Y the sha.ft,'andfcaxnslearriedby theshaftand e engaging with' the hoisting arms for giving an initial upward thrust toth'e body.v

'2a-A damping `vehicle havin-g, 1in. combilnation, ia ldu'r'npnig body, hoistlngarms for the bodyeach consisting of a pai'I-of'sp'aced sfide plates, a sha-ft, cable'j-c'onneetions `from y, the vsha-ft to each hoistingy arinand initially disposed'between the sidelplates Vthereof for j exerting a '-pull onthe Vhoistin-"gTai-'ins when.

the shaftis rota-ted,`and means for confining the cable as itis Wound onthe shaft in a plane between the planes ofthey side' plates whereby' lateral stresses onthefhoisting' arms iorn thev Shaft( to the hoisting arrfisadapted toeitei't a substantiallyflongitiidinal pull onV the'hoistin'g' arms when the shaft'is rotated,

a pair"- of cams engaging jeaelfholsting 'arm when 7 the shaft is first rotatedffor giving an initial pwar'd 'thrust to" the body, the cams being spaced on theshaft so as to confine the Winding of the' cablev to `eliminate siibstan-V tially all lateral stresses on: the hoisting arms.

4. A dumping vehicle having, in Combination, a dumping body, afpair of hoisting arms for the body each consisting ofV a'single f piecevof` metal bent into va yoke shape'v Withl spaced side plates', 'ashaft,a cable Connecting the shaftwith each hoisting'arm to "exjertl a Y' 'longitudinal'pul'l onl the' hoisting' arm lwhen the shaft is rotated, a cam roller foreach hoistingr arm, arpai'rfofV cams engaging. each Cain rollerto exert an initial thrust'to the body, the cams being spaced onV the shaft so as t'o pass' between the side platesof the'hoistr-l ing -a'rmsj upon the continued :rotation ofthe shaft, and to confine the' Winding of the' Cab-le to prevent appreciablelateral stressesion the hoisting' arms,

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